Hydraulic hoist for truck bodies



NOV. 11, 1952 T, WORKMAN ETAL 2,617,684

HYDRAULIC HOIST FOR TRUCK BODIES 2 SHEETS-SHEET l Filed Nov. 22, 1949 INVENTORJ Hlorlman BYTE. for/kraan fr; @LM any;

NOV 11, 1952 T. l.. woRKMAN Erm.

l HYDRAULIC HOIST FOR TRUCK BODIESv Filed Nov. 22, 1949 2 SHEETS- SHEET 2 I N VEN TOR5 Patented Nov. 11, 1,952

HYDRAULIC HOIST FOB TRUCK BODIES Thomas L. Workman and Harold B. Workman,

Woodburn, Greg.f

Application November 22, 1949, serial No".128,692

`This invention-relates toa hydraulic hoist for truck bodies.,

An object of this invention is to provide anI improved hydraulic hoist for truck bodies which embodies a j pairof hydraulic operators pivotally mounted'on the opposite'sides of the chassis and pivotallyconnected to the body.

Another object of ,this invention is to provide improved brackets or hangers for securing the hydraulic operators to the truck frame or chassis and to the truck body.

With'the above and other objects in view, our invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claim.

In the drawings,

Figure 1 is a detail side elevation of a hydraulic operator secured to a truck frame and body, the latter being fragmentarily shown, constructed according to an embodiment of this invention,

Figure 2 is a fragmentary sectional View taken on the line 2-2 of Figure 1,

Figure 3 is a fragmentary sectional View taken on the line 3-3 of Figure 1,

Figure 4 is a fragmentary sectional View taken on the line 4 4 of Figure 1,

Figure 5 is a fragmentary sectional View taken on the line 5.-5 of Figure l,

Figure 6 is a fragmentary sectional view taken on the line 6-5 of Figure 1,

Figure 7 is a fragmentary sectional view taken on the line l-l of Figure 5.

Referring to the drawings, the numeral Iii designates generally the frame or chassis of a truck which has pivotally mounted on the rear portion thereof a body II. The body II has secured to the lower side thereof transverse channel members I2, and a pair of longitudinal channel members I3 are secured to the channel men.- bers I2.

The chassis Il! includes a pair of longitudinal side channel members I4 and the rear ends of the channel members I4 have secured thereto L-shaped brackets I5 formed with bearing bosses I6. A longitudinally curved bracket I'l is secured by fastening means I8 to the body channel members I3, and each bracket member Il isl formed of an inner plate E3, having marginal fianges 20.

A bracing web 2| is disposed between the outer flanges 2l! and terminates at its lower end in a bearing boss 22 through which a pivot pin 23 engages. The pin 23 also engages through the bear- Y ing boss IB.

The body I I is adapted to be raised or lowered 1 claim. (C1. 29e- 22) I with respect to the chassis l0 by means of a pairL ofhydraulic operators generally designated as 24.'r Y 'Ijhe operators`24 include a hydraulic cylinder -25 having a rear head or wall 2,6, and a forward wall or head 2l. The wall or head 2'! is disposed ina counterbore 28 formed inrtheforwardend of Athe cylinder'25, and the` head-21 is secured within the counterbore- 28 bylmeans of a split locking ring29 engaging in anannular groove 30 formed-A in the cylinder 25.A i The cylinder 25 is rockably secured tofthesidechannel member I4 by means of'a bracket'generally designated as 3|.,` lThe bracket 3I-Sin'clude`s tion. The Z-shaped member 33 includes an outer plate 3l disposed in spaced parallel relation with the lower portion of the plate 32 and a pivot pin 38 engages through the two plates 32 and 31.

A bearing sleeve 39 is fixed as by welding 40 or other suitable fastening means to the end member 23 of the cylinder 25, and the pin 38 loosely engages through the sleeve 39. The cylinder 25 is adapted to be connected to a source of uid pressure supply by means of a supply pipe line 4 I.

A piston, generally indicated at 42, is slidably mounted in cylinder 25. The piston 42 includes 'a pair of plates 43 and 44 with a cup-shaped gasket or sealing member 45 clamped by means of a clamping nut 46. The clamping nut 46 is threaded onto a reduced diameter stud 4'I carried by a piston rod 48. The piston rod 48 slidably engages the cylinder head 2'IV and has secured to the forward end thereof a bearing sleeve or crosshead 49 which pivotally engages a body bracket generally designated as 50.

The bracket 50 is formed of an inner plate 5I and a substantially Z-shaped plate 52. The Z- shaped plate 52 includes an inner plate 53 secured to the plate 5I and to the longitudinal body channel member I3 by fastening means 54. The

i Z-shaped member 52 includes an outer plate 55 bearing against the outer end of the sleeve or crosshead 49, and a pivot pin 56 is loosely extended through the plates 5I and 55 and the crosshead 49.

In the use and operation of this operator. the

two cylinders 25 are connected to a source of liquid pressure supply by the pipe line 4I which is connected to the rear portion of the cylinder 25. When liquid is forced into the cylinder 25 the piston 43 will be forced outwardly and the body I I will be raised to the desired angular position with respect to the chassis I.

We do not mean to conne ourselves to the exact detailsofxconstruction herein disclosed, but claim allv varationsifalling within'thepurview of the appended claim.

What we claim is:

In a truck having a horizontal .frame .and a a body, a bracket on said body,`mean's hingedly securing said bracket to theframe at and below the extreme end thereof, means for swinging pthe body on the frame having abottom normallyparallel to said frame, lsaid means comprising a vpair of hydraulic cylinders, a bearing sleeve .on'one end of each cylinder, a bracket including an aperturedy .atplateand an offset plate having an aperture 'faligned Awith Jthe aperture in .said flat plate. Asecured to-each side of said frame, -a pivot pin. extending zthrough the apertures of Yeach bracketfand'anassociatedbearing sleeve for pivotal 'mounting of said 'cylinder on said frame, a piston ineach cylinder, -a piston rod connected to\-each piston, a bearing sleeve carried by the outer -end of each piston rod, a bracket carried by each side of said body including anapertured ilatgplateandan offset plate-havingan aperture aligned -withthe aperture in said last mentioned flatlplate, and afpivotpin extending through the .4 apertures in each of said last mentioned brackets and its associated bearing sleeve for pivotal connection of said piston rods to said body, each of said last mentioned brackets being secured to said body at an acute angle relative to said normally horizonta1 bottom, each of said first mentioned flat plates including an outwardly flared arcuate guide at its upper end for aligningfsaidbody when returnedto horizontal position.

THOMAS L. WORKMAN.

HAROLD B. WORKMAN.

REFERENCES CITED TIhe following references are of record in the ille 'of this patent:

YIITNITED .STATES PATENTS Number Name Date 880,733 Hayes Mar. 3, 1908 1,509,875 Rasnick et al Sept. 30,Y 1924 2,004,744 Ballert Junell, 1935 2,034,544 Wood Mar. 171936 2,113,044 Eisenberg Apr. 5,1938 v2,231,242 VBarrett Feb. 11, 1941 r2,402,362 Biszantz June 18, 1946 2,427,381 Borgogno Sept. 16, 1947 FOREIGN PATENTS Number Country Date 70,680 Austria Dec. 10,'1915 748,375 France Apr..10, 1933 

